Temperature gauge for sadirons



April 22 1924. 1,491,580

SANDOB BOGNAR, OF

PATENT OFFICE,

ITHACA, NEW YORK.

TEMPERATURE GAUGE FOR SLADIRONS. I

. Application filed April 6,

To all whom it may concern:

Be it known that I, Simeon BoeNAR, a citizen of Hun ry, reeidin atIthaca, in' the county of m kins an Stateof New York, have inventecertain new and useful Improvements in Temperature Gauges for Sadirons,of which the following is a specification.

This invention relates to certain new and useful improvements intemperature gauges for sad irons and has particular reference to athermostatically operated indicator for determinin the temperature ofthe iron, allowin t e supply of electric current to be cut 0 andpreventing the overheating of the- 11011.

The primary object of the invention is to i a provide a temperaturegauge for sad irons wherein a thermostatically operated indicator arm isdisposed within a socket or cavity formed in the body of a sad iron withthe indicator arm bein clearly viewable through a glass plate isposed atthe i upper side of the iron body.

Wi h the. above and ther objects in view as; the nature -.of theinvention is better understood, the same consists of thenovel form,combination and arrangement of parts hereinafter more fully described,shown in the accompanying drawing and claimed,

In the drawing, wherein like reference characters designatecorresponding parts throughout the several views,

' ,Figure 1' is a side elevational view, partly broken away and shown insection of a sad iron constructed in accordance with the presentinvention and equipped with the improved temperature gauge, I

Figure 2 is a horizontal sectional view taken on line I'I'-II of Fig. 1,e Figure 3 is a fragmentary topplan view of a modified form ofthennventlon, Figure .4 is a detail sectional view taken on line IV-IVof Fig. 3, and

Figure is a perspective view of the retaining sleeve shown in Figs. 3-and 4 for the temperature gauge. I

Beferring more in detail to the accompanying-drawings,,there isillustrated a temperature gauge forelectrically heated sad irons, theiron body l'being provided with the usual handle '2 and ca ng' a socket3' and a conduit plug that is p wed in circuit with the resistance,element 4.

The central portion of the body 1 is provided with an internallythreaded socket 5 v parent, it bein noted that the heat in 1923. SerialNo. 630,297.

opening at the'upper end of the body 1, theresistance element 4extending across the bottom of the socket as shown in Fig. 1. A bearingplate in the form of a ring 6 carries centrally positioned spider bars 7having their crossed points providedlwith a bearing stud 8 while thering 6 adjacent the inner edge thereof carries an upwardly directedannular flange 9.

The temperature gauge includes a sleeve 10 having a centrallyaperturedcross wall 1 1 ad acent its upper end, an indicator. shaft 12 beingjournaled in the aperture of the wall 11 and carryingan indicator hand13 upon its upper end. A coiled thermostatic element 14 encloses theindicator shaft 12,

being anchored at one of its ends to said shaft and at its other end tothe sleeve 10.

In placing the temperature gauge in the socket 5, the lower end of thesleeve 10 frictionally encloses thefiange 9 of the ring 6' as shown inFig. 1 with the lower end of the indicator shaft 12 extending into thestud 8 of the spider bars 7 .To retain the temperature gauge in itsoperative position, a screw sleeve 15 is threaded as shown in Fig. 2.The lowerend of the threaded sleeve 15 engages the ring 6 vfor rigidlymounting the ring and temperature gauge in the socket 5, the flange 16of the threaded sleeve being provided with diametrically oppositeopenings 19 to be engaged by a spanner wrench for adjusting the same.

device, it is believed that the construction and operation thereof willat once be socket 5 will e ect the thermostatic element 14 for shiftingthe indicator arm 13 for From the above detail description of the iceregistering the exact temperature of the sad A modified form of theanchoring means for the-temperature gaugeis shown 1n Fi 3 to 5, thesleeve 10' carrying diametrica ly opposite outwardly directed cars 20that receive fastening devices 21 entering the body portion 1 of theiron.

While there are hereinshown and described'the preferred embodimentsofthe present invention, it is nevertheless to be understood that minorchanges may be made therein without departing from the spirit shaft. agraduated transparent plate supported on the upper end of the sleeveabove the indicator arm, and means for retaining the sleeve andfplate inthe socket.

2. In a device of the class described, av sad iron having a sockettherein, a vertical indicator shaft rotatable in the socket, anindica-tor arm carried by the upper end of the shaft, a thermostaticelement associated with the indicator shaft, a sleeve inclosing theshaft, a graduated transparent plate supported on the upper end of thesleeve above the indicator arm, and a sleeve threaded into the socketinclosing the first named sleeve and engaging the upper end thereof foranchoring the same inthe socket. 3. In a device of the class described,a sad .iron having a socket therein, a vertical indicator shaftrotatable in the socket, an indicator arm carried by the upper end ofthe shaft, a thermostatic element associated with the indicator shaft, asleeve inclosing the shaft, a graduated transparent plate supported onthe upperend of the sleeve above

